The fabrication of Polymethyl Methacrylate(PMMA) nanosphere and the technique of coating Ag layer

摘要

Firstly we fabricated the monodisperse PMMA nanospheres with the diameter of about 170 nm by emulsifier-free emulsion polymerization. Then we modified the PMMA nanospheres' surface with (3-methacryloxypropyl) trimethoxysilane (MATS) and (3-mercaptopropyl) trimethoxysilane (MPTMS), resulting in a final, uniform sulfhydryl (SH)-group modified outlayer. Ag nanoparticles further grew on the modified surface of PMMA nanospheres with an effective interaction between sulfhydryl (SH) groups and Ag ion. In doing so, we finally synthesized PMMA/Ag core-shell composited nanoparticles.